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No problem. It has tested to flow just under the Cosworth manifold, which many consider to be the ultimate manifold for a Subaru motor. I changed from a '00 EJ25 manifold to an '06 EJ25 manifold and picked up 32hp (on a heavily modified NA motor).

Sell the Borla's and put something useful under there...... I haven't tried the Moore Performance header yet, but I hope to very soon. The design looks solid. The Borla is just a noise maker (beautiful blatty boxer rumble that it is) and they crack if you look at them wrong.....